中文摘要：

生物多样性空间分布格局及其成因一直是生态学和保护生物学研究的热点。文中以大青山山地为研究对象,基于植物群落调查,通过物种和功能群层次多样性指数的计算,及其与环境因子的相关性、典范对应分析,旨在揭示山地生物多样性的空间分布格局及其成因。研究结果表明：（1）大青山具有丰富的植被类型,植被型包括森林、灌丛和草原三种;（2）大青山植被物种多样性分布格局具有垂直特征;（3）坡向是导致植物群落物种多样性差异的主要影响因子;（4）水热因子共同作用的环境条件是决定山地植被生物多样性分布格局的主要原因。

英文摘要：

Spatial distribution pattern and its causes of biodiversity are the hot topics in the study of ecology and conservation biology. Based on the plant community survey in Daqingshan Mountain , by the calculation of index of diversity of species and the functional group （PFG） level, and analysis of its correlation with environmental factors, canonical correspondence analysis（ CCA）, the spatial distribution pattern and causes of biodiversity were revealed. Research results show that： （1） The Daqingshan is rich in vegetation types with forest, scrub and grassland. （2） The Daqingshan vegetation distribution patterns of species diversity appears with vertical characteristic. （3） The slope is the main impact factor to lead to the plant community species diversity difference. （4）The combined environmental conditions of hydrothermal factor decided the mountain vegetation distribution pattern and the main causes of biodiversity.